Stereopticon-control device



Nov. 29, 192 7.

G. S. VERNAM STEREOPTICON CONTROL DEVICE Filed Oct. 31. 1925 INVENTOR G.'5'. Vrl/amm/ Wat ATTORNEY Fatented Nov. 29,1927.

barren STATES eeann e 'r T "OFFICE.

GILBERT s. VERNAM, or IVER EDGE, NEW JERs Y, AssIeNon '10 AMERICAN TELE-PHONE AND TELEGRAPH COMPANY, A CORPORATION or NEW YORK,

srnnnorriooN-oonrnon nEvIcE.

Application filed October 31, 1925. seri al No. sa ls.

This invention relates to display devices, such as stereopticons, andmore particularly to arrangements for operating and controlling thesame. I

It is a primary object of the invention to provide arrangementswhichmake it (possible for a person giving a public addressillustrated'by stereopticon views to control the change of pictures jfrom any desirable place and froinany distance from either theprojecting machine orthe audience. For example, the speaker might be onthe stage and the projector at the'rear of the room, or the speakermight be in one city and the audience and project-r in another, the twobeing connected by a telephone wire, or radio link, and loud speaker,and a control circuit. By the arrangements of the invention it wouldalso be possible for a speaker to give illustrated lecture to severalaudiences at once, as it would be possible to exercise control over thechangingof all of the pictures from one vspot. Other objects andfeatures of the invention will appear more fully, from the detaileddescription thereof hereinafter given.

The invention may be more fully understood from the followingdescription together with the accompanying drawing in.

the figure of which is illustrated a diagram of the control circuit anda side view, partly in cross-section of the apparatus of the invention.y i

In. the drawing is shown a base member 14 on which is mounted a holdersupport 2' with a groove therein. Adapted to slide in this groove is aholder 1, upon which the picture plates 3 and 3 may be mounted. Theholder 1, has two open spaces 4 and 5 therein. The picture plates 3 and3'- would be mounted in front of these openings. By sliding the holder 1either to the right or which is exposed h to the light, whereby thepicture may be thrownupon a screen. The holder 1 is moved to the rightor the left by llfl lever ,7 which is pivotally mounted on a member 8.The lever? is operated by the shafts 9 or 10 which are attached'to theplungers of the'solenoids lland 12.

Thesesolenoids are operated alternately by a control circuit 24 and akey 23, as will be pointed out hereinafter.

Solenoid 11 consists of a winding '15 niounted on a tubular member16'having end pieces '17 and 17. An iron yoke having pole pieces 18 and18 is shown, wh ohextends around one side of the solenoid as indicatedby the dotted lines 19 and 19', and is aflixed. to the base member 14'.The

plunger 20 operates inside of the tubular member 16. Insertedin thetubular member 16 is themember 21, which has a small hole drilledthrough it, which may be partially closed by the screw 22. This smallairhole serves to form a cushion for the operation of the plunger 20.The solenoid l2 is substantially the same in detail as solenoid 11, andaccordingly, further description of its construction will be omitted.

The operation of the arrangements are asfollows: The lecturer controlsthe movement of the holder 1 by means of a key 23 located,'as has beenpointed out, at any desirable place. The'key 23 operates any desirablenumber of control circuits such ZLSiQ/i to operate pictureshiftingm'echanism simi lar to that heretofore described, associatedwith each control circuit. The control circuit 24 is arranged so thatthe first closure and opening of the contacts ofkey 23 leaves,

the two relays 25 and 13 locked up, while the next closure and openingreleases them. In

other words, the alternate or odd-numbered pulses'from the contactsofkey 23 operate relay 13 andsolenoid 12 to move the picture plate 3 tothe leftand away from the projectingspace 6. On the other hand, theevennumbered pulses will release relay 13, there by operating solenoid11 to move picture plate 3 to the right and away from projecting space 6and to again place another picture plate in'place of plate 3 in frontofthe projecting space 6; The circuit operation is as follows; When key isfirst closed,

27, contact key 23, conductor 28, right hand break contact of relay 25,conductor 29, winding of relay 13 to round. This will operate relay 13,which will close the following locking circuit: from ground, winding ofrelay 13, contact 10f relay 1B, conductor 30, winding of relay 25,conductor 31 to battery 26 and ground, However, relay25 will notbperateat this time becauseits winding is short circuitedasfollows left-handarma-- ture of relay 25, conductor 27 contacts of key 23, conductor 28,conductor 29, contact and armature of relay 13, conductor 30, winding ofrelay 25, conductor 31, left-hand breakcontact of relay 25 to theleft-hand armature of relayt'25zagain. VVhenzthe contacts of key23areinow opened, this short circuit, about vthe windingof relay 25willbe removed, and relay 25will operate and remain operated over theheretofore traced locking circuit forjrelay 513. The operation ofrelay25 transfers its, left-handarmature from a contact leading to battery 26to a contact leading to gr ound.- Accordingly, upon the next-closure ofthe key 23 the winding of relay v13 :willbe short circuited as follows:

from ground, left-hand armature of relay 25,

conductor'27, contacts of key, 23, conductor 28, right-hand make contactof relay 25, winding of relay 25, conductor 31 to battery 26 and ground.This will hold relay 25 operated, but will release the relay .13. Therelease of relay 13 will connect battery to the windings of solenoid 11to again-shift the picture holding arrangements. When key 23' is nowopened again, the last mentioned circuit througlrrelay 25- will be open,and the circuit will be restored to its original condition.

While theiinvention has been pointed out in certain specificarrangements; which are deemed desirable,.it':is understood that it "iscapable of embodimentin many other forms without-departing fromithespirit ofthe invention, asdefined in the appended claims.

YWhat is claimed is:

1. A display device comprising a base member, a horizontalsupport.membcr attached 'thereto, two-solenoids attachediosaid basemember, a display holdeiuadapted to slide in said horizontal support;.l1]0l1ll)0.l,;fl lever pivotally connected to said display holder andto said horizontalsupport member, means to control said lever by saidsolenoids, and control I mechanism for alternately operating saidsolenoids, said controlime'chanism comprising-a control relay adapted-toopen and close operating circuits for said solenoids, an operatingcircuit for said'control relay, switching mechanism, in said operatingcircuit, asaid operating circuit being arranged so that the initialclosing of said switching mechanism will operate said control relay, alocking circuit for said control relay, means controlled by thesubsequent opening of said switchim mechanism for preparing a shortcircuit tor the winding of said control relay with respect to saidlocking circuit, means controlled by the subsequent closing of saidswitching mechanism for closing said short circuit and releasing saidcontrol relay, and means controlled by the subsequent opening of saidswitching mechanism for restoring sa id 11 iecliauisim to normal. I I

2. A display device comprising a base member, a grooved horizontalsupport member attached thereto, two solenoids attached to said basemember, a projecting space member attached to said horizontal support, aholder. having a number ofapertures therein and adapted to slide in thegrooved portion of said horizontal support member whereby differentonesof said apertures may be positioned next to said projecting spacemember, means controlled'by said solenoids for slidably moving saidholder, and control mechanism for alternately operating said solenoids,said control mechanism comprising a control relay adapted'to open andclose operating circuits for said solenoids, an operating circuit "forsaid control relay, switching mechanism in said operating circuit, saidoperating circuit being arranged, so that the initial closing of saidswitching mechanism will operate said control relay, a locking circuitfor said control relay, means controlled by the subsequent opening ofsaid switching mechanism for preparing a short circuit for the windingof saidcontrol relay with respect to said locking circuit, meanscontrolled by the subsequent closing of said switching mechanism forclosing said short circuit and releasing said control relay, and meanscontrolled by the subsequent opening of said switching mechanism forrestoring said mechanism to normal V 3. A display I device comprisingabase member, a grooved horizontal support member attached thereto, twosolenoids attached to said base member, a projecting space memberattached to said horizontal support, a holder having a number ofapertures therein and adapted io-slide in the grooved portion ofsaidhorizontal support member, a lever pivotally connected to saidholder and to said horizontal support member for i111- parting a slidingmovement to said holder, means controlled by each of said solenoids foroperating said lever in difl'erent directions, and control mechanism foralternately operating said solenoids, said control mechanism: comprisinga control relay adapted to open and close operating circuits for saidsolenoids, an operating circuit for said control relay,switchingmechanism in said operating circuit, said operating circiiit being saidcontrol relay with respect to saidlock ing circuit, means controlled bythe subsequent closing of said switching mechanism for closing saidshort circuit and releasing said control relay, and means controlled bythe subsequent opening of said switching mechanism for restoring saidmechanism to normal.

4. A display device comprising a base member, a grooved horizontalsupport mem ber attached thereto, two solenoids attached to said basemember, a projecting space member attached to said horizontal support, aholder having a. number of apertures therein and adapted to slide in thegrooved,

portion of said horizontal support member, a lever pivotally connectedto said holder and to said horizontal support member for impartingasliding movement to said holder,

, means controlled by each 0t said solenoids for operating said lever indifferent directions, and control mechanism for alternately operatingsaid solenoids, said control mechanism comprising a control relayadapted to open and close operating circuits for said solenoids, anoperating circuit for said control relay, switching mechanism in saidoperating circuit, said operating circuit being arranged so that theinitial closing of said switching mechanism will operate said controlrelay, a locking circuit for said control relay, means controlled by thesubsequent opening of said switching mechanism for preparing a shortcircuit for the winding of said control relay with respect to saidlocking circuit, means controlled by the subsequent closing of saidswitching mechanism for closing said short circuit and releasing saidcontrol relay, and means controlled by the subsequent opening of saidswitching mechanism for restoring said mechanism to normal.

5. A display device comprising a base member, a horizontal supportmember attached thereto, two solenoids attached to said base member, adisplay holder adapted to slide in said horizontal support member,alever pivotally connected to said display holder and to saidl'iorizontal support member,

means to control said lever by said solenoids,

and control mechanism for alternately operating said solenoids, saidcontrol mechanism comprising a controlrelay adapted to open and closeoperating circuits for said solenoids, an operating circuit for saidcontrol relay, switching mechanism in said operating circuit, saidoperating circuit being arranged so that the initial closing of saidswitching mechanism will operate said control relay,

a locking circuit forsaidcontrol relay,means controlled by thesubsequent opening of said switchingmechanism for preparing a shortcircuit for the winding of said control relay withrespect tosaidlocltingcircuit, means controlled by the subsequent closing of saidswitching mechanism for closing said short circuit and releasmgsaidcontrol relay, and

means controlled by the subsequent opening of said switching mechanismfor restoring said mechanism to normal.

(i A display device comprising a base member, a grooved horizontalsupport mem ber attached thereto, two solenoids attached to said basemember, a projecting space member attached to said horizontal support, aholder having a numberoft apertures therein and adapted to slide in thegrooved portion of said horizontal support member, a lever pivotallyconnected to said holder and to said'horizontal support member forimparting a sliding movement in opposite direc tions to said holder,means controlled by each of said solenoids for operating said lever inopposite directions, and control mechanism for alternately operatingsaid solenoids, said control mechanism comprisinga control relay adaptedto open and close operating circuits for said solenoids, an operatingcircuit for said control relay, switching mechanism in said operatingcircuit, said operating circut being arranged so that the initial.closing of said switching mechanism will operate said control relay, alocking cir- .cuit for said control relay, means controlled by thesubsequent opening of said switching til) lGO

member, a horizontal support member attached thereto, two solenoidsattached to said base member, a display holder adapted to slide in saidhorizontal support member, a lever pivotally connected to said displayholder and to said horizontal support member, means to control saidlever by said solenoids, and control mechanism for alternately operatingsaid solenoids, said control mechanism comprising a control relayadapted to openand close operating circuits for said solenoids, anoperating circuit for said control relay, swtching mechanism in saidoperating circuit, said operating circuit being arranged so that theinitialiclosing of said switching mechanism will operate said con trolrelay, a locking circuit for said control relay, means controlled by thesubsequent opening of said switching mechanism for preparing a shortcircuit for the winding of normal, said switching mechanism in said saldcontrol relay with respect to said lockoperatlng circuit be ng locatedat a point ing circuit, means controlledby the subsegeographicallydistant from said display quent closing of said switching mechanismdevice.

for closing said short circuit and releasing In testimony whereof, Ihave signed my saidv control relay,and.1neans controlled by name to thisspecification this 27th day of the'subsequent opening of said switchingOctober, 1925.

mechanism forrestoring said mechanism to GILBERT S. VERNAM.

